Re: sound

[Rudolf Marek <MAREKR2@cs.felk.cvut.cz>]

On Mon, 24 Jun 2002, philippe wrote:

> Date: Mon, 24 Jun 2002 23:51:11 +0200
> From: philippe <pvir@freesurf.fr>
> To: Linux-assembly@vger.kernel.org
> Subject: sound
> 
> hi
> I am new on this list and my name is Philippe.
> I used to make some programs on windows but wanted to trye on linux.
> I have a problem with a small prog i had done for windows witch play
> sounds on the fm chip of a sound card.
> But when i translate it on linux, it doesn't work any more.
> It compile and link correctly(nasm), but on execution it writes:
> segmentation fault!
Maybe You have no permission to write to that ports.
Use io_perm syscall to set it.

Also this king of programming is not good choice for linux. Use kernel to 
do the dirty work. You can use a "services" (ioctls) of sound driver to 
produce sound. I think there is an tutorial on www.linuxassembly.org
for a sound too.


> I post you the sources at the end of this message.
> 
> I had an other question:
> Where can I find bible of all the interruptions and what is the  name of
> it?

It is called Ralf's Brown Inetrrupt list.
Use google.com to find it (it was on Simtelnet mirrors)


Regards

	Rudolf

> 
> 
> Philippe
> 
> 
> 
> 
> ;************************************************
> ;*		Ecriture sur SoundBlaster		*
> ;*1-ecrire dans le adresse port0x388		*
> ;*2-attendre 12 cycles					*
> ;*3-ecrire dans le data port0x389			*
> ;*4-attendre 84 cycles					*
> 
> ;compiler:
> ; nasm -f elf SBB.asm
> ; ld -s -o SBB SBB.o
> 
> 
> section .text                           ;section declaration
> 
>                         ;we must export the entry point to the ELF
> linker or
>     global _start       ;loader. They conventionally recognize _start as
> their
>                         ;entry point. Use ld -e foo to override the
> default.
> 
> _start:
> 
> 
> ;mettre tous les registres SB a zero
> 	mov edx,0x388	;port adresse
> 	mov eax,0x20		;registre sb 20
> 	out dx,al
> 	mov edx,0x389	;data port
> 	mov al,7
> 	out dx,al
> 
> mov edx,0x388	;port adresse
> mov al,0x40	;registre sb 40
> out dx,al
> 	;call WaitR
> 	mov edx,0x389	;data port
> 	mov al,0x10
> 	out dx,al
> 	;call WaitR
> 
> mov edx,0x388	;port adresse
> mov al,0x60	;registre sb 20
> out dx,al
> 	;call WaitR
> 	mov edx,0x389	;data port
> 	mov eax,0xf0
> 	out dx,al
> 	;call WaitR
> 
> 	mov edx,0x388	;port adresse
> 	mov al,0x80		;registre sb 20
> 	out dx,al
> 	mov edx,0x389	;data port
> 	mov al,70
> 	out dx,al
> 
> mov edx,0x388	;port adresse
> mov al,0x23	;registre sb 20
> out dx,al
> 	;call WaitR
> 	mov edx,0x389	;data port
> 	mov eax,1
> 	out dx,al
> 	;call WaitR
> 
> mov edx,0x388	;port adresse
> mov eax,0x43	;registre sb 20
> out dx,al
> 	;call WaitR
> 	mov edx,0x389	;data port
> 	mov eax,00
> 	out dx,al
> 	;call WaitR
> 
> mov edx,0x388	;port adresse
> mov eax,0x63	;registre sb 20
> out dx,al
> 	;call WaitR
> 	mov edx,0x389	;data port
> 	mov eax,0xf0
> 	out dx,al
> 	;call WaitR
> 
> mov edx,0x388	;port adresse
> mov eax,0x83	;registre sb 20
> out dx,al
> 	;call WaitR
> 	mov edx,0x389	;data port
> 	mov eax,0x7f
> 	out dx,al
> dest3:
> 	mov cx,0xff
> dest2:
> 
> 	mov edx,0x388	;port adresse
> 	mov al,0xa0		;frequency
> 	out dx,al
> 	mov edx,0x389	;data port
> 	mov al,cl
> 	xor al,dl
> 	out dx,al
> ;**send the sound now gogogogo go
> 	mov edx,0x388	;port adresse
> 	mov eax,0xb0	;registre sb 20
> 	out dx,al
> 	mov edx,0x389	;data port
> 	mov eax,0x31
> 	out dx,al
> 	call Waitc
> 	call Waitc
> 	call Waitc
> 	call Waitc
> 
> 	loop dest2
> ;*******************************************************
> 
> mov edx,0x388	;port adresse
> mov eax,0xb0	;registre sb 20
> out dx,al
> 	;CHK:	;attend qu'on appuye sur la touche espace*****
> 
> 	;mov ah,8
> 	;mov dl,0xFF
> 	;int 0x21
> 	;cmp al,' '	;espace
> 	;je SUITE
> 	;jmp CHK
> ;SUITE:
> 	mov edx,0x389	;data port
> 	mov eax,0
> 	out dx,al
> 
> ;mov ax,0x4c
> ;int 0x21
> 
>         mov     ebx,0   ;first syscall argument: exit code
>         mov     eax,1   ;system call number (sys_exit)
>         int     0x80    ;call kerne
> 
> 
> 
> Waitc:
> 	push ecx
> 	mov ecx,0x8fff
> W1:
> 	nop
> 	loop W1
> 	pop ecx
> 	ret
> Waitb:
> 	push ecx
> 	mov ecx,0x1fff
> W2:
> 	nop
> 	loop W2
> 	pop ecx
> 	ret
> -
> To unsubscribe from this list: send the line "unsubscribe linux-assembly" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> 
>